Cooling or refrigating apparatus.



PATENTED MAR. 22, 1904.

. B. ADDY. COOLING OR REFRIGERATING APPARATUS.

APPLICATION FILED MAY 8. 1903.

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No. 755,429; PATENTED MAR. 22, 1904. B. ADDY; COOLING 0R. REFRIGERATING APPARATUS.

APPLICATION FILED MAY 8. 1903.

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Patented March 22, 1904.

UNITED STATES PATENT OEEIcE.

BENJAMIN ADDY, OF LEEDS, ENGLAND.

COOLING OR REFRIGERATING APPARATUS- SPECIFICATION forming part of Letters Patent No. 755,429, dated March 22, 1904.

Application filed May 8, 1903. Serial No. 156,270. (No model.)

To ai /Ll whom it may concern:

Be it known that I, BENJAMIN ADDY, a subject of the King of Great Britain and Ireland, residing at Leeds, in the county of York, England, have invented Improvements in Cooling or Refrigerating Apparatus, of which the following is a specification.

This invention relates to cooling or refrigerating apparatus, such as in the manufacture of ice-cream and the like is used for the treatment of a fluid or semifiuid composition; and it has for its object to enable such composition to be easily and economically cooled or frozen and to be retained in the cooled or solidified condition-for any desired period of time.

Apparatus in accordance with this invention comprises several annular chambers that are arranged round a central tube and the walls of which are secured together. These chambers and the central tube are preferably of sheet metal, and some of them are inclosed, while others may be open or provided with orifices.

Figures 1, 2, and 3 of the accompanying drawings show, respectively, in plan, vertical section, and side elevation an example of apparatus in accordance with this invention, while Figs. 4 and 5 are views of details of the same.

A cylindrical central tube 1 has at its lower end 2 a bottom piece 3, wherein is an orifice 4:, that communicates with a chamber 5. The upper end 6 of the tube 1 is furnished with a removable lid 7. Around the central tube 1 is an annular chamber 8, whose bottom 9 is of dished or segmental section and is secured to the outside of the central tube 1 and to the wall 10 of the chamber 8. The upper end 11 of the chamber 8 is furnished with a removable lid 12, provided with a handle 13, and at some distance from the bottom of the chamber 8 there is arranged a removable lid 16, that is provided with lifting-loops 17 and rests on annular supports and 14, that are respectively secured on the'outside of the central tube 1 and the inner side of the wall 10 of the chamber 8. These supports may be made of wire, preferably of square cross-section. The chamber 8 is surrounded by an annular chamber 18, that has at its lower end a bottom 19 and at its upper end a top piece 20, that is securedto the wall 10 of chamber 8 and the wall 21 of the .chamber 18. In the top piece are formed orifices 22, provided with neck-pieces 23, that extend through the space 24: and the outer cover 32 and are furnished with removable lids 26, that are provided with chambers 27 on their under sides. The space 5 between the bottoms 3 and 19 can be put in communication with the outside of the apparatus through a tap orncock 28, which can be opened or closed at W1 chamber 29, that has a bottom 30 and is closed at its upper end by the cover 32, secured to the side wall 10 and the outer casing 33. In the cover 32 are orifices 34, provided with screwcaps 35. handles 36 for lifting the apparatus and carrying it about. The chambers and the central tube may be of circular crosssection, as shown, or'of oval or other suitable section. The annular chamber 29 and the space 31 between the bottom plates 19 and 30 are filled through the orifices 34: with material-such, for example, as slag-wool-that is a bad conductor of heat, and'the chambers 27 in the lids 26 are filled with similar material.

The operation of the apparatus is as follows: A suitable freezing mixture is introduced into the central tube 1, the chamber 18, and the space 5 through the necks 23, which are then closed by the lids 26. The substance to be cooled or fr0zen-for example, ice-cream composition or the likeis then introduced into the annular chamber 8, the lids 16 and 12 being removed for this purpose and afterward replaced. The composition is then cooled or frozen by the action of the freezing mixture sition to the atmosphere being thus avoided.

What I claim is A cooling apparatus comprising a receptacle for the material to be cooled, an ice-chamber Around the chamber 18 is an annular,

On the outside of the casing 32 are.

I0 overlying the same to completely inclose said second chamber, and an entrance-opening to the second chamber formed through the insulating-chamber.

Signed at the city of Leeds, in the county of York, England, this 18th day of April, 1903. 5

BENJAMIN ADDY.

Witnesses:

R.- E. P. CRAVEN,- J. H. WHITAKER. 

